Copyright © 2026 Authors retain the copyright of this article. This article is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

@article{179370,
        author = {Shreeyash Gawade and Prof. Nitin Borse and Atharva Gumte and Aditya Gite and Atharva Gawande and Ishwari Ghaysundar and Mrunal Gorghate},
        title = {Analysis and Evaluation of Rear Car Diffuser for Drag Reduction and Enhanced Downforce},
        journal = {International Journal of Innovative Research in Technology},
        year = {2025},
        volume = {11},
        number = {12},
        pages = {6219-6223},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=179370},
        abstract = {This study investigates the optimization of a
vehicle (especially a car model) diffuser to improve
underbody flow and minimize aerodynamic drag for
conventional passenger cars. Based on Computational
Fluid Dynamics (CFD), the investigation examines how
changes in diffuser angle and fin shape affect airflow
characteristics and the total drag coefficient. The diffuser
design was refined by making slight increases in the
length and height of conventional straight fins and by
varying the mounting angle to enhance smoother flow
expansion toward the back of the vehicle. Simulation
results indicate that such modifications result in a
quantifiable reduction of drag, resulting in better airflow
stability and vehicle efficiency for a particular model.
This work seeks to offer pragmatic and affordable advice
for enhancing aerodynamic performance in production
cars, without the necessity for sophisticated or
motorsport-oriented components.},
        keywords = {},
        month = {May},
        }